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February 2, 2024 NHTSA CAMPAIGN NUMBER: 24V068000
Unintended Deactivation of Warning Lights/Stop Arm
An unintended deactivation of the warning lights and retraction of the stop arm during use increases the risk of a crash or injury.
NHTSA Campaign Number: 24V068
Manufacturer Blue Bird Body Company
Components ELECTRICAL SYSTEM
Potential Number of Units Affected 5,197
Summary
Blue Bird Body Company (Blue Bird) is recalling certain 2021-2024 Vision school buses. Firmware in the multiplex module may cause the warning lights to deactivate and the stop arm to retract without warning.
Remedy
Dealers will update the multiplex firmware, free of charge. Owner notification letters are expected to be mailed March 26, 2024. Owners may contact Blue Bird customer service at 1-478-822-2242. Blue Bird’s number for this recall is R24CX (SB).
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Chronology :
June 9, 2023: Blue Bird was notified by Ametek
July 25, 2023: Blue Bird verified affected
October 27, 2022: Blue Bird received parts with correct firmware. Blue Bird Clean, per Ametek App Version 1.2
October 27, 2022: Any other important / milestone dates- Ametek Official release of APP 1.2 Blue Bird’s supplier Ametek, provides multiplex modules for the BBCV product, has informed Blue Bird there is a firmware issue with some of the modules.
As part of the investigation, Blue Bird tried to replicate the failure mode in a vehicle. To date, there have been no field reports that would indicate a customer has experienced this issue.
The Blue Bird Engineering team also reviewed the severity of the systems that could be impacted by losing a ‘saved state’ function during the module reset. The team determined that the vehicle warning light system and stop arm would be impacted. The warning lights are activated by a momentary switch and will begin flashing the amber lights as the vehicle prepares for a stop. When the driver opens the entrance door the red lights will begin flashing and the stop arm will extend to alert other vehicles. If the module reset were to occur within this sequence, the warning lights would be deactivated and stop arm retracted without a warning to the driver.
4 Affected Products
Vehicle
MAKE | MODEL | YEAR |
BLUE BIRD | VISION | 2021-2024 |
2 Associated Documents
Recall Acknowledgement
RCAK-24V068-2351.pdf 645.391KB
Defect Notice 573 Report
RCLRPT-24V068-3371.PDF 214.854KB
Latest Recalls Documents
For the Latest and Most recent Recall Information Visit the link below…
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=24V068&docType=RCL
Heavy Duty Truck Reprogramming
Description:
Designed for flexibility, the USB-Link 3 Wired Edition connects to your PC, tablet, or smartphone with a USB cable, allowing techs to directly connect to a device when working in the field or during signal interruptions.
Built to support the latest protocols (CAN FD, DoIP) and compatible with a wide range of OEM diagnostics software, the USB-Link 3 is our most advanced VCI to date, with the performance and technology you can rely on well into the future.
The USB-Link™ 3 comes with the following:
- Latching USB Cable (PN 404032)
- 9-Pin Deutsch Adapter, 1 Meter (PN 493128)
- J1962 Adapter (16-Pin OBD II, 1 Meter (PN 491113)
The USB-Link™ 3: Wireless is also available (PN 121052).
Specifications
Vehicle Network Protocol Support
CAN FD / J1939 FD / ISO15765 FD - 250K, 500K, 1M b/s with auto baud detection
Single wire CAN (SWCAN)
ISO 11898-3 Fault Tolerant CAN (FTCAN)
Diagnostics Over Internet Protocol (DoIP)
J1708
J1850 VPW (Class 2)
ISO PWM (SCP)
ISO 9141 / KWP2000 (ISO 14230) K/L line
ALDL 9600 and 8192 baud
ATEC 160 baud
Windows® Vehicle Communication API
Windows® Vehicle Communication API
RP1210 a/b/c
J2534 (2004 draft)
J2534-1 partial implementation (commercial vehicle focused)
Operating System Compatibility
iOS
Android™
Windows® 10, 11
Interfaces to Computing Platforms
USB 2.0 (vehicle-to-PC connectivity)
Bluetooth® 2.1 + EDR
Wi-Fi (dual band)
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Allison DOC® For PC-Service Tool - Protocols Supported: J1939, J1708/J1587, and J1850
Allison DOC® For Fleets (1000/2000) - Protocols Supported: J1939, J1850
Allison DOC® For Fleets (3000/4000) - Protocols Supported: J1939, J1708/J1587
Eaton ServiceRanger
Bendix ACom
WABCO Toolbox
Freightliner ServiceLink
International ABS
International DLB
International Intune
International IPC v2.02
PACCAR DAVIE4
Diesel Laptops Nexiq USB Link 3 Wireless Edition with Repair Information & Diagnostic Software | |
Diesel Laptops Nexiq USB Link 3 Wired Edition with Repair Information & Diagnostic Software |
Nexiq Blue-Link Mini Product Number NQ126015 Nexiq Blue Link Mini™ Vehicle Communication Interface |
NEXIQ Technologies 124032 USB-Link 2 Connector | |
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DiagnosticLink Order Site:
DiagnosticLink Direct Link:
https://diagnosticlink.nexiq.com/DTNA/Default.aspx
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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 24V-068
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Blue Bird Body Company FEB 02, 2024 NHTSA Recall No. : 24V-068 Manufacturer Recall No. : R24CX (SB) Manufacturer Information :
Manufacturer Name : Blue Bird Body Company Address : P.O. Box 937
402 Blue Bird Boulevard Fort Valley GA 31030
Company phone : 478-822-2242
Population :
Number of potentially involved : 5,197 Estimated percentage with defect : 100 %
Vehicle Information : Vehicle 1 : 2021-2024 Blue Bird Vision
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : GAS
Descriptive Information : Blue Bird’s supplier Ametek, who provides multiplex modules for the BBCV product, has informed Blue Bird there is a firmware issue with some of the modules. This issue can cause the multiplex module to reset while in operation. Certain Blue Bird Vision School Buses equipment with Ametek Multiplex Modules Software have a firmware issue. The reset would occur momentarily and would not cause any loss of function of the vehicle’s primary systems. However, the reset would cause any ‘saved state’ functions to be lost. A ‘saved state’ function occurs when a momentary switch is used to activate a sequence of events. If the reset occurred during the sequence after a momentary switch was activated, the remainder of the sequence would not be completed.
Production Dates : OCT 28, 2021 – NOV 15, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : Blue Bird’s supplier Ametek, who provides multiplex modules for the BBCV product, has informed Blue Bird there is a firmware issue with some of the modules. This issue can cause the multiplex module to reset while in operation.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : Blue Bird evaluated the risk to motor vehicle safety related to this issue and determined this could be a potential risk to safety due to the impact of the warning light system. If the module reset were to occur within the warning
light sequence, the warning lights would be deactivated and the stop arm Part 573 Safety Recall Report 24V-068 Page 2 retracted without a warning to the driver potentially causing a crash and or injury.
Description of the Cause : Blue Bird’s supplier Ametek, who provides multiplex modules for the BBCV product, has informed Blue Bird there is a firmware issue with some of the modules. This issue can cause the multiplex module to reset while in operation. Identification of Any Warning
that can Occur : There is no audible or visual warning, which would precede an event. Involved Components : Component Name 1 : Module,Multiplex,Ametek Dixson Component Description : Multiplex Module
Component Part Number : 10059122 Supplier Identification : Component Manufacturer
Name : Ametek Dixson Address : 287 27 Road
Grand Junction Colorado
Country : United States Chronology :
June 9, 2023: Blue Bird was notified by Ametek July 25, 2023: Blue Bird verified affected
October 27, 2022: Blue Bird received parts with correct firmware. Blue Bird Clean, per Ametek App Version 1.2
October 27, 2022: Any other important / milestone dates- Ametek Official release of APP 1.2 Blue Bird’s supplier Ametek, provides multiplex modules for the BBCV product, has informed Blue Bird there is a firmware issue with some of the modules. As part of the investigation, Blue Bird tried to replicate the failure mode in a vehicle. To date, there have been no field reports that would indicate a customer has experienced this issue. The Blue Bird Engineering team also reviewed the severity of the systems that could be impacted by losing a ‘saved state’ function during the module reset. The team determined that the vehicle warning light system and The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 24V-068
Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
stop arm would be impacted. The warning lights are activated by a momentary switch and will begin flashing the amber lights as the vehicle prepares for a stop. When the driver opens the entrance door the red lights will begin flashing and the stop arm will extend to alert other vehicles. If the module reset were to occur within this sequence, the warning lights would be deactivated and stop arm retracted without a warning to the driver.
Description of Remedy :
Description of Remedy Program : All affected units are in the field need to have the multiplex firmware
updated to the latest version to eliminate the risk of the failure mode. Updated firmware files have been uploaded to Vantage for all affected vehicles and should be updated per R24CX Recall Repair Instructions.
If the modifications directed by this notification were performed on your bus prior to the receipt of this recall notification, provide a copy of the work order/invoice to campaignparts@blue-bird.com for Blue Bird warranty consideration. How Remedy Component Differs from Recalled Component : Identify How/When Recall Condition was Corrected in Production : Updated software files have been uploaded to Vantage for all affected vehicles.
Current production units have the correct multiplex software and are not at risk for the failure mode. All affected units that are in the field need to have the multiplex software updated to the latest version to eliminate the risk of the failure mode. Updated software files have been uploaded to Vantage for all affected vehicles. Ametek Base software is APP 1.2 or greater is good.
The recall condition was corrected in Production upon receipt of Ametek modules, which included the updated firmware. Recall Schedule :
Description of Recall Schedule : Dealer and Owner Notifications are to be issued on or before March 26,
2024
Updated firmware files have been uploaded to Vantage for all affected vehicles.
Planned Dealer Notification Date : MAR 26, 2024 – MAR 26, 2024
Planned Owner Notification Date : MAR 26, 2024 – MAR 26, 2024
* NR – Not Reported
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